---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-107631"
form_type: "8-K"
ticker: "MLM"
cik: "0000916076"
company_name: "MARTIN MARIETTA MATERIALS INC"
filed_at: "2024-09-18T23:59:59+00:00"
generated_at: "2026-05-31T04:08:01.704865+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Martin Marietta receives MSHA 107(a) order at North Indianapolis Quarry for unsafe work practice

## Summary
- On Sept 12, 2024, MSHA issued a section 107(a) order after a miner stood on the motor of an elevated screen deck, exposing a fatal fall risk.
- No injuries occurred; corrective action was taken promptly and the order has been terminated.
- The incident happened at the North Indianapolis Quarry in Indianapolis, Indiana.

## SEC filing metadata
- accession: 0000950170-24-107631
- form_type: 8-K
- ticker: MLM
- cik: 0000916076
- company_name: MARTIN MARIETTA MATERIALS INC
- filed_at: 2024-09-18T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.04
- EDGAR index: https://www.sec.gov/Archives/edgar/data/916076/000095017024107631/0000950170-24-107631-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/916076/000095017024107631/mlm-20240912.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-107631
- JSON: https://secwatch.observer/filing/0000950170-24-107631.json
- Plain text: https://secwatch.observer/filing/0000950170-24-107631.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.